Iran's president-elect Ebrahim Raisi, referred to as a mass murderer by global rights groups, was a key player in the mass killings.
One of the four suspects arrested in connection with the murder of security analyst Hisham al-Hashemi has been linked to Iran-backed Kataib Hizbullah.
The ongoing flow of Iranian arms to the Houthis has cost innumerable civilian lives in Yemen and inflamed conflicts in the Horn of Africa and beyond.
The Syrian regime is the main perpetrator of enforced disappearances, which have been carried out 'with consistency' for over a decade.
Paramilitary groups made political gains in Iraq after the defeat of ISIS, but are losing support as more Iraqis see them as a dangerous entity that threatens the country with its own resources.
Yemenis say the Houthis' crimes are an attempt to crush dissent and force their opponents to submit to their will or flee the country.
Observers say a series of recent Captagon busts suggests Hizbullah wants to strike out at their political opponent Saudi Arabia.
The role Iran is playing in directing and supporting militias in Iraq, foremost Kataib Hizbullah, is so obvious that Iraqis are no longer holding back on their contempt.
Dozens of family members have given blood samples, which will be compared to the DNA of the remains of victims found at the Badoush site.
The announcement comes one day after an attack with three explosive-laden drones on Baghdad airport where US troops are deployed. It was the first such attack on targets in the capital.